The mathematician does not study pure mathematics because it is useful; he studies it because he delights in it and he delights in it because it is beautiful.

预测未来最好的方式就是创造未来。

制定不相容原理纯粹是为了电子们自己好，如果让它们自由来往的话，它们恐怕会腐败堕落（而变成妖魔鬼怪）。

我喜欢狗。你总是知道狗在想什么。它有四种情绪。快乐、悲伤、生气和专注。